Rod-packing.



F. N. MASON & J. F. CRAVEN.

ROD PACKING.

APPLICATiON FlL ED JULY 25. 19m

Patented Feb. 13, 1917.

.l/V W Y ATTORNEY.

WIT/VESSE kp/W W @M FRANK N. IvTASON, OF PITTSBURGH, AND JAMES F.CRAVEN, OF GRAFTON HEIGHTS, PENNSYLVANIA; SAID CRAVEN ASSIGNOR TO SAIDMASON.

ROD-PACKING.

packing designed for use in connection with steam, air, gas, or waterappliances, in which it is desirable to provide a tight nonleakablepacking around a movable rod or the like.

It is the object of our invention to provide certain improvements on thepacking shown in Letters Patent No. 971,292 granted September 27th,1910, to Frank N. Mason, whereby additional means are provided toprevent the passage of steam or other fluid past the packing and wherebyadditional lubricating means are introduced. The present inventionprovides means for preventing steam or other fluid from passing betweenthe end of the sectional packing sleeve, and the bottom of thestuffing-box, and also means for preventing thepassage of steam or otherfluid past the flanged en largement on the inner end of the said sleeve.Other objects will appear hereinafter.

Referring to the accompanying drawings, Figure 1 is a longitudinalsection of a stuffing-box containing our invention applied to a rodshown in side elevation; Fig. 2, a perspective view of our improvedsleeve assembled; Fig. 3, a bottom plan of one of the sections of thesaid sleeve; Fig. 4, an elevation of one of the said sections, lookingtoward the concave or inner surface; Fig. 5, a section on the line VV ofFig. 1; and Fig. 6, a perspective of a modified form of sleeve section.

On the drawings, 1 represents a piston-rod or the like having around itthe stufiing-box 2, the gland 3, and the screw cap 4, the latter beingarranged to cause the gland 3 to compress the packing-rings 5 in amanner well known.

The sleeve 6, which is composed of any suitable anti-friction metal orother antifriction material, is seated in the stuffingbox 2, surroundsthe rod 1, and has its outwardly-flanged inner end 7 influid-tightengagement with the bottom of the stuffingbox 2. The said endof the sleeve 6 is pro- Specification of Letters Patent.

Patented Feb. 113, 1917..

Application filed July 25, 1914. Serial No. 853,065.

- vided with several ribs, which may be variously shaped and arranged,but 1 have shown some of the ribs 8 arc-shaped and intersected by radialribs 9, whereby numerous pockets 10 are provided which open toward thebottom of the stuffing-box. The ribs provide narrow surfaces whichreadily adapt or adjust themselves to the shape of the bottom wall ofthe stuffing-box and in sure joints, past which steam or other fluidcannot force its way.

The packingrings 5 are composed of a comparatively soft yieldingmaterial, arranged in the stuffingbox 2 and around the body of thesleeve 6, and between the gland 8 and the outer face of the flange 7,that is, the face thereof opposite the face which bears the said ribs.This material may he asbestos.

The sleeve 6 is composed of a plurality of I longitudinal separablesections 11 assembled around the rod 1 with their lateral edges providedwith an interlocking series of tongues. Some of the tongues, as 12. formarc-shaped extensions of the sections, but do not include the flange 7,while other tongues, as 13, include a portion of the said flange. Allthe tongues have their lateral edges lying in planes at right angles tothe axis of the sleeve 6 or the shaft 1. The intermediate tongues oneach sleeve-section lie in recesses 14 between adjacent tongues on theadjacent section the terminal tongue 15 on the reduced portion or bodyof each section lies in the terminal recess 16 between the outer tongue12 and the adjacent or outer end of the adjacent section; and theterminal tongue 17. which includes a portion of the flange 7 next to theribbed or inner end of the section, lies in the terminal recess 18 whichlies between the tongue 13 and the ribbed end of the adjacent section.

The inner surface of the tongue 13 on each sleeve-section, that is, thesurface nearest the ribbed end thereof or the surface nearest the bottomof the stuffing-box is provided for about a half its length and aboutonethird its width with the lug or ribbed extension 19 which lies in therecess 20 in the tongue 17, the end wall of the recess 20 lying somewhatbeyond the end walls of the adjacent recess 14. The tongue 17 extendssomewhat beyond the outer end of the adprevents the escape of steam orthe like both longitudinally between the adjacent edges of thesleeve-sections, and also transversely or radially across the adjacentedges on the flanges. The adjacent sections of the flange 7 arecontiguous for a distance along a plane which is normal to the axis ofthe sleeve and leaves about half the flange on each side thereof.

The length of the tongues and the depth of the recesses therefor aresuch that there is some looseness of the assembled sections on the rodwhereby the sections may be adjusted toward the said rod to take up thewear between the sleeve and the rod. Fig. 2 shows spaces between theends of the tongues and the recesses for permitting the said adjustmentof the sections.

21 represent grooves on the concave or hollow surface of thesleeve-sections, for collecting condensation from the steam orcompressed air, thereby preventing leakage be- 1 tween the rod and thepacking. "We provide also a lubricant groove 22 on the hollow face ofthe sleeve-sections opposite the flange 7. This groove we made larger inwidth and depth than the grooves 21 and it is supplied with achemically-mixed graphite lubricant having a high fusing point.

When the cap 4 is screwed down tightly on the gland 3, the latter causesthe packing to force the ribbed end of the sleeve 6 tightly against thebottom of the stufiing-box 2 and also causes the packing to spreadlaterally or radially against the wall of the stuffingboX and the sleeve6, thereby making tight joints between the packing and the startingboxand between the packing and the sleeve. At the same time the sleevesections are brought tightly in contact with the rod 1. The cap 4 may bedrawn down from time to time to take up the wear between the rod and thesleeve and keep all the joints tight.

1. In a rod packing, a stufing-box, a reciprocable rod therein, ananti-friction sleeve around the rod and w thln the studing-box, thesleeve being provlded with narrow ribs in contact with the bottom of thestuffing-box, and means for pressing the ribbed end of the sleeveagainst the bottom of the said stuffing-box whereby the ribs may beadjusted so as to conform to the shape of the bottom of the stufing-box.

2. In a rod packing, a stuffing-box, a reciprocable rod therein, ananti-friction sleeve around the rod and within the stuffing-box, thesleeve being provided with areshaped narrow ribs in contact with thebottom of the stufiing-box, and means for pressing the ribbed end ofthe'sleeve against the bottom of the said stuffing-box whereby'the ribsmay be-adj usted so as to conform to the shape of the bottom of thestating-box.

3. In a rod packing, a stufling-box, a re ciprocable rod therein, ananti-friction sleeve around the rod and within the stutfing-box, thesleeve being provided with areshaped narrow ribs intersected bytransverse ribs in contact with the bottom of the stuffing-box, andmeans for pressing the ribbed end of the sleeve against the bottom ofthe said striding-box whereby. the ribs may be adjusted so as to conformto the shape of the bottom of the stuiiingbox.

Signed at Pittsburgh, Pa., this 23rd day of July A. D. 1914.

FRANK N. MASON. JAMES F. CRAVEN.

Witnesses:

ALICE E. DUFF, ELVA STANIOH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

